CN101236251A - Phase demodulation distance-finding method - Google Patents
Phase demodulation distance-finding method Download PDFInfo
- Publication number
- CN101236251A CN101236251A CNA2007100539125A CN200710053912A CN101236251A CN 101236251 A CN101236251 A CN 101236251A CN A2007100539125 A CNA2007100539125 A CN A2007100539125A CN 200710053912 A CN200710053912 A CN 200710053912A CN 101236251 A CN101236251 A CN 101236251A
- Authority
- CN
- China
- Prior art keywords
- phase
- signal
- identification signal
- communication
- processing module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a phase discrimination distance measuring method, which comprises the following steps that: a first phase identification signal and a distance measurement request signal are transmitted by a first communication apparatus to a second communication apparatus; phase discrimination of a second phase identification signal and the first phase identification signal is performed by the second communication apparatus, and then second phase difference is obtained; the second phase identification signal and a reply signal containing the second phase difference are transmitted to the first communication apparatus by the second communication apparatus; phase discrimination of the second phase identification signal and the second phase identification signal is performed by the first communication apparatus, and then first phase difference is obtained; the first communication apparatus calculates phase delay which is generated by the distance between the first communication apparatus and the second communication apparatus due to signal transmission according to the first phase difference and the second phase difference, and calculates the distance between the first communication apparatus and the second communication apparatus according to the phase delay. The phase discrimination distance measuring method of the invention does not need assistance of ternary devices, and bilateral distance measuring and positioning can be conveniently realized only by utilization of the prior communication relationship.
Description
Technical field
The present invention relates to a kind of phase demodulation distance-finding method, especially a kind of the utilization in the electronic communication process because the method for the signal phase that distance causes delay carrying out range observation location belongs to the communications field.
Background technology
In the actual life, utilize optics and radio phase ranging that we often use are located, and are the fixed radio transmitting stations (comprising satnav) that utilizes known a plurality of spacings to determine, realize range finding or location.With the satellite communication is example, Fig. 1 is the principle assumption diagram of satnav, as shown in Figure 1, at four satellite (satellites 5 of a certain specific time, satellite 6, satellite 7 and satellite 8) respectively to object 3 to be positioned and object to be positioned 4 transmitted radio signal, the radio system of object 3 to be positioned and object to be positioned 4 measures distance between object 3 to be positioned and object to be positioned 4 and the satellite by the transmission time of measuring radio signal respectively, and the position at described specific moment satellite is known, can calculate the position of object 3 to be positioned and object to be positioned 4 thus, finally can draw the distance between object 3 to be positioned and the object to be positioned 4.
Though above-mentioned distance-measuring and positioning method is of many uses, too rely on spacing is determined or phase place is determined fixed radio transmitting station or satellite, increased the range finding positioning cost simultaneously.
Summary of the invention
The objective of the invention is at the existing in prior technology deficiency, a kind of phase demodulation distance-finding method that can make distance between the direct measurement of a communication facilities and another communication facilities is provided.
For achieving the above object, the invention provides a kind of phase demodulation distance-finding method, this method may further comprise the steps:
Step 1: be sent to second communication equipment after the communication distance measuring signal modulation of first communication facilities with the distance between the first phase identification signal and request measurement and the second communication equipment;
Step 2: described second communication equipment demodulates described first phase identification signal and described communication distance measuring signal, and the second phase identification signal of described second communication equipment carried out phase demodulation with the described first phase identification signal, obtain second phase differential of the phase difference value of described second phase identification signal of sign and the described first phase identification signal;
Step 3: described second communication equipment is sent to described first communication facilities with the described second phase identification signal and after including the return signal modulation of described second phase differential;
Step 4: described first communication facilities demodulates described second phase identification signal and described return signal, and described first phase identification signal and the described second phase identification signal carried out phase demodulation, obtain identifying first phase differential of the phase difference value of described first phase identification signal and the described second phase identification signal;
Step 5: described first communication facilities because signal transmits the phase delay that distance produced between described first communication facilities and the described second communication equipment, and calculates distance between described first communication facilities and the described second communication equipment according to the velocity of propagation of described phase delay and described first phase identification signal or the described second phase identification signal according to described first phase differential and described second phase difference calculating.
Need to prove that the first phase identification signal and the second phase identification signal are the frequency function signal of fixed phase relationship in the technique scheme; Because the frequency function signal has periodically, for avoiding because the distance calculation mistake that the periodicity of phase identification signal causes, when the distance of two communication facilitiess is distant, can adopt macrocyclic phase identification signal or make the described first phase identification signal and the described second phase identification signal uses the frequency function of several different cycles as the phase identification signal simultaneously, draw the first phase identification signal of different cycles and the phase differential of the second phase identification signal, eliminate the periodic influence of frequency function signal, the convenient distance of measuring exactly between described first communication facilities and the described second communication equipment.
The signal phase that technique scheme causes by the distance of measuring communicating pair in the communication process location that postpones to find range, the 3rd equipment that need not assist, only utilize original correspondence can realize easily that both sides find range and locate.
Also in conjunction with the accompanying drawings the present invention is described in further detail below by specific embodiment.
Description of drawings
Fig. 1 is the structure principle chart of existing satellite communication;
Fig. 2 is the process flow diagram of phase demodulation distance-finding method specific embodiment 1 of the present invention;
Fig. 3 is the process flow diagram of phase demodulation distance-finding method specific embodiment 2 of the present invention;
Fig. 4 is the frequency signal oscillogram of phase demodulation distance-finding method specific embodiment 2 of the present invention;
Fig. 5 is the process flow diagram of phase demodulation distance-finding method specific embodiment 3 of the present invention;
Fig. 6 is the process flow diagram of phase demodulation distance-finding method specific embodiment 4 of the present invention;
Fig. 7 is the process flow diagram of phase demodulation distance-finding method specific embodiment 5 of the present invention;
Fig. 8 is the system construction drawing of phase demodulation distance-finding method of the present invention;
Fig. 9 is the concrete system construction drawing of phase demodulation distance-finding method of the present invention;
Figure 10 is the process flow diagram of phase demodulation distance-finding method specific embodiment 6 of the present invention.
Embodiment
Fig. 2 is the process flow diagram of phase demodulation distance-finding method specific embodiment 1 of the present invention, and as shown in Figure 2, this embodiment specifically may further comprise the steps:
Step 101: be sent to second communication equipment 2 after the communication distance measuring signal modulation of first communication facilities 1 with the distance between the first phase identification signal and request measurement and the second communication equipment 2;
Step 102: described second communication equipment 2 demodulates described first phase identification signal and described communication distance measuring signal, and the second phase identification signal of described second communication equipment 2 carried out phase demodulation with the described first phase identification signal, obtain second phase differential of the phase difference value of described second phase identification signal of sign and the described first phase identification signal;
Step 103: described second communication equipment 2 is sent to described first communication facilities 1 with the second phase identification signal and after including the return signal modulation of described second phase differential;
Step 104: described first communication facilities 1 demodulates described second phase identification signal and described return signal, and described first phase identification signal and the described second phase identification signal carried out phase demodulation, obtain identifying first phase differential of the phase difference value of described first phase identification signal and the described second phase identification signal;
Step 105: described first communication facilities 1 because signal transmits the phase delay that distance produced between described first communication facilities 1 and the described second communication equipment 2, and calculates distance between described first communication facilities 1 and the described second communication equipment 2 according to the velocity of propagation of described phase delay and described first phase identification signal or the described second phase identification signal according to described first phase differential and described second phase difference calculating.
The output valve of the phase detector in the technique scheme (being phase differential or phase differential correlative) can show as the count value of counter, level value of quantification or the like according to the difference of communication facilities.
The phase delay that technique scheme causes by the distance of measuring communicating pair in the communication process location of finding range, the 3rd equipment that need not assist, only utilize original correspondence can realize easily that both sides find range and locate.
Fig. 3 is the process flow diagram of phase demodulation distance-finding method specific embodiment 2 of the present invention, present embodiment is the application of the present invention in radio communication, in this embodiment first communication facilities 1 and second communication equipment 2 are radio transceiver, all be made as single worker's single frequency operation pattern, modulation system is the scale-of-two frequency modulation (PFM), both sides receive and dispatch the changeless modulating frequency of phase place that the carrier frequency frequency is F, both sides (being the phase identification signal) and are f0, and both distances are D rice.Utilize counter in the communication facilities to represent the phase differential of modulating frequency.If whenever frequency of modulation pulse f0 from low level when high level saltus step (phase place be 0 degree), counter reset and since 0 counting.If counter can be counted Z from 0 maximum in the one-period of f0.Because first communication facilities 1 and second communication equipment 2 are two autonomous devices, both modulating oscillation frequency f 0 can not be fully synchronously, if the modulating frequency of the modulating frequency phase place actual hysteretic second communication equipment 2 of first communication facilities 1, phase differential immobilizes in the communication overall process and is P, it is X that phase differential P can make the rolling counters forward of second communication equipment 2, and it is Y that the phase differential that distance D between the two produces can make rolling counters forward.As shown in Figure 3, this embodiment may further comprise the steps:
Step 201: first communication facilities, 1 emission distance measurement request signal, modulating frequency f0 carries out frequency modulation (PFM) to carrier frequency simultaneously;
Step 202: described second communication equipment 2 obtains second phase differential receiving that the described request signal carries out phase demodulation to the modulating frequency f0 of first communication facilities 1 that demodulates and the f0 of second communication equipment 2 simultaneously, is expressed as X+Y with counter;
Step 203: described second communication equipment 2 emissions include the return information of second phase differential, and modulating frequency f0 also carries out frequency modulation (PFM) to carrier frequency simultaneously;
Step 204: described first communication facilities 1 carries out phase demodulation to the modulating frequency f0 of the second communication equipment 2 that demodulates simultaneously and the f0 of first communication facilities 1 after receiving described return signal, obtain first phase differential, is expressed as (Z-X)+Y with counter;
Step 205: described first communication facilities 1 draws the phase delay that distance produced between described first communication facilities 1 and the described second communication equipment 2 according to described first phase differential and described second phase differential, be expressed as [(X+Y)+(Z-X+Y)-Z]/2=Y with counter, and calculate distance D between described first communication facilities 1 and the described second communication equipment 2 according to described phase delay Y.
Establishing a f0 period counter in the foregoing description can have 100 pulse: Z=100, and the pulse that phase differential P produces is 30: X=30, and the phase differential pulse that distance D produces is made as 25: Y=25, as shown in Figure 4.First communication facilities, 1 transmit frequency signal during the beginning phase demodulation distance-finding, second communication equipment 2 receives, counter is after second communication equipment 2 phase demodulations: X+Y=55 pulse, and send this value to first communication facilities 1, second communication equipment 2 transmit frequency signal then, first communication facilities 1 receives: when the f0 of second communication equipment 2 from low level when the high level saltus step is modulated carrier frequency F, first communication facilities, 1 counter has produced Z-X=70 pulse, add the pulse that distance D produces, the Counter Value of first communication facilities 1 is: 70+25=95 pulse.Therefore, this moment, first communication facilities 1 can draw the phase differential pulse number that radio produces according to the data message of second communication equipment 2 and the phase differential correlative of calculating in round trip: (55+95)-and 100=50, divided by the cycle of multiply by pulse after 2 again, and, can draw distance D between the two according to radio propagation speed.
Fig. 8 is the system construction drawing of phase demodulation distance-finding method of the present invention, and as shown in Figure 8, this system comprises first communication facilities 1 and second communication equipment 2; Fig. 9 is the concrete system construction drawing of phase demodulation distance-finding method of the present invention, as shown in Figure 9, described first communication facilities 1 comprises signal transmitting and receiving processing module A1, signal generator module A2, phase demodulation modules A 3 and central processing unit A4, be connected to each other in twos between them, described second communication equipment 2 comprises signal transmitting and receiving processing module B1, signal generator module B2, phase demodulation module B3 and central processing unit B4, be connected to each other in twos between them, be connected between signal transmitting and receiving modules A 1 and the signal transmitting and receiving module B1.
Fig. 5 is the process flow diagram of phase demodulation distance-finding method specific embodiment 3 of the present invention, and this embodiment specifically is divided into several steps with each step of embodiment 1 on the basis of embodiment 1, and as shown in Figure 5, the concrete steps of this embodiment are as follows:
Step 3011: the signal generator module A2 in first communication facilities 1 produces the first phase identification signal and request is measured and second communication equipment 2 between the communication distance measuring signal of distance, and the described first phase identification signal and described communication distance measuring signal be sent to signal transmitting and receiving processing module A1 in first communication facilities 1;
Step 3012: after described signal transmitting and receiving processing module A1 receives described first phase identification signal and described communication distance measuring signal, with the signal transmitting and receiving processing module B1 that is sent to after described first phase identification signal and the modulation of described communication distance measuring signal in the second communication equipment 2;
Step 3021: the signal transmitting and receiving processing module B1 in the second communication equipment 2 demodulates described first phase identification signal and described communication distance measuring signal, and the described first phase identification signal is sent to phase demodulation module B3 in the second communication equipment 2, signal generator module B2 in the second communication equipment 2 produces the second phase identification signal, and the described second phase identification signal is sent to described phase demodulation module B3;
Step 3022: described phase demodulation module B3 carries out phase demodulation to described second phase identification signal and the described first phase identification signal, obtains identifying second phase differential of the second phase identification signal and the first phase identification signal phase difference;
Step 3023: described phase demodulation module B3 is sent to described signal transmitting and receiving processing module B1 with described second phase differential;
Step 3031: described signal generator module B2 produces return signal, and described second phase identification signal and described return signal are sent to described signal transmitting and receiving processing module B1;
Step 3032: described signal transmitting and receiving processing module B1 is with the described second phase identification signal and the signal transmitting and receiving processing module A1 that is sent to described first communication facilities 1 after including the return signal modulation of described second phase differential;
Step 3041: described signal transmitting and receiving processing module A1 demodulates described second phase identification signal and described return signal;
Step 3042: described signal transmitting and receiving processing module A1 is sent to described phase demodulation modules A 3 with the described second phase identification signal, described second phase differential is sent to central processing unit A4 in described first communication facilities 1, and described signal generator module A2 is sent to described phase demodulation modules A 3 with the described first phase identification signal;
Step 3043: 3 pairs of described first phase identification signals of described phase demodulation modules A and the described second phase identification signal carry out phase demodulation, obtain identifying first phase differential of the phase difference value of the first phase identification signal and the second phase identification signal, and described first phase differential is sent to described central processing unit A4.
Fig. 6 is the process flow diagram of phase demodulation distance-finding method specific embodiment 4 of the present invention, and first communication facilities and second communication equipment are respectively two mobile communication equipments among this embodiment, as shown in Figure 6, this embodiment on the basis of embodiment 3,
Also comprising step 3010 before the described step 3011: the signal transmitting and receiving processing module A1 of the central processing unit A4 of first communication facilities 1 in first communication facilities 1 sends the speed query statement of the velocity information be used to inquire about second communication equipment 2;
This embodiment is except that the advantage with embodiment 3, first communication facilities 1 is by sending the velocity information that the speed query statement can obtain second communication equipment 2 easily to second communication equipment 2, similarly, also can instruct other the corresponding information that obtains second communication equipment 2 by the status poll of sending other to second communication equipment 2.
Fig. 7 is the process flow diagram of phase demodulation distance-finding method specific embodiment 5 of the present invention, and as shown in Figure 7, this embodiment also comprises after step 105 on the basis of embodiment 1:
Step 106: first communication facilities 1 will send to second communication equipment 2 after will including the signal modulation of range information between first communication facilities 1 and the second communication equipment 2.
Present embodiment can also make the communication facilities both sides can know between the two distance simultaneously except that the advantage with embodiment 1.
Figure 10 is the process flow diagram of phase demodulation distance-finding method specific embodiment 6 of the present invention, and as shown in figure 10, this embodiment also comprises following step in step 305 on the basis of embodiment 3:
Step 3061: the signal that described central processing unit A4 will include range information between described first communication facilities 1 and the described second communication equipment 2 is sent to described signal transmitting and receiving processing module A1;
Step 3062: be sent to described signal transmitting and receiving processing module B1 after the signal modulation of described signal transmitting and receiving processing module A1 with range information between described first communication facilities 1 and the described second communication equipment 2;
Step 3063: described signal transmitting and receiving processing module B1 demodulates the signal of range information between described first communication facilities 1 and the described second communication equipment 2 and is sent to described central processing unit B4.
Present embodiment can also make the communication facilities both sides can know between the two distance simultaneously except that the advantage with embodiment 6.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (10)
1. phase demodulation distance-finding method is characterized in that may further comprise the steps:
Step 1: be sent to second communication equipment (2) after the communication distance measuring signal modulation of first communication facilities (1) with the distance between the first phase identification signal and request measurement and the second communication equipment (2);
Step 2: described second communication equipment (2) demodulates described first phase identification signal and described communication distance measuring signal, and the second phase identification signal of described second communication equipment (2) carried out phase demodulation with the described first phase identification signal, obtain second phase differential of the phase difference value of described second phase identification signal of sign and the described first phase identification signal;
Step 3: described second communication equipment (2) is sent to described first communication facilities (1) with the described second phase identification signal and after including the return signal modulation of described second phase differential;
Step 4: described first communication facilities (1) demodulates described second phase identification signal and described return signal, and described first phase identification signal and the described second phase identification signal carried out phase demodulation, obtain identifying first phase differential of the phase difference value of described first phase identification signal and the described second phase identification signal;
Step 5: described first communication facilities (1) because signal transmits the phase delay that distance produced between described first communication facilities (1) and the described second communication equipment (2), and calculates distance between described first communication facilities (1) and the described second communication equipment (2) according to the velocity of propagation of described phase delay and described first phase identification signal or the described second phase identification signal according to described first phase differential and described second phase difference calculating.
2. method according to claim 1 is characterized in that described step 1 is specially:
Step 11: signal generator module (A2) in first communication facilities (1) produces the first phase identification signal and request is measured and second communication equipment (2) between the communication distance measuring signal of distance, and the described first phase identification signal and described communication distance measuring signal be sent to signal transmitting and receiving processing module (A1) in first communication facilities (1);
Step 12: after described signal transmitting and receiving processing module (A1) is received described first phase identification signal and described communication distance measuring signal, with the described first phase identification signal and described communication distance measuring signal as modulation signal and be sent to signal transmitting and receiving processing module (B1) in the second communication equipment (2).
3. method according to claim 1 and 2 is characterized in that described step 2 is specially:
Step 21: the signal transmitting and receiving processing module (B1) in the second communication equipment (2) demodulates described first phase identification signal and described communication distance measuring signal, and the described first phase identification signal is sent to phase demodulation module (B3) in the second communication equipment (2); Signal generator module (B2) in the second communication equipment (2) produces the second phase identification signal, and the described second phase identification signal is sent to described phase demodulation module (B3);
Step 22: described phase demodulation module (B3) is carried out phase demodulation to described second phase identification signal and the described first phase identification signal, obtains identifying second phase differential of the phase difference value of the second phase identification signal and the first phase identification signal;
Step 23: described phase demodulation module (B3) is sent to described signal transmitting and receiving processing module (B1) with described second phase differential.
4. method according to claim 1 is characterized in that described step 3 is specially:
Step 31: described signal generator module (B2) produces described second phase identification signal and the return signal, and described second phase identification signal and described return signal are sent to described signal transmitting and receiving processing module (B1);
Step 32: described signal transmitting and receiving processing module (B1) is with the described second phase identification signal and the signal transmitting and receiving processing module (A1) that is sent to described first communication facilities (1) after including the return signal modulation of described second phase differential.
5. method according to claim 1 is characterized in that described step 4 is specially:
Step 41: described signal transmitting and receiving processing module (A1) demodulates described second phase identification signal and described return signal;
Step 42: described signal transmitting and receiving processing module (A1) is sent to described phase demodulation module (A3) with the described second phase identification signal, and described second phase differential is sent to central processing unit (A4) in described first communication facilities (1); Described signal generator module (A2) is sent to described phase demodulation module (A3) with the described first phase identification signal;
Step 43: described phase demodulation module (A3) is carried out phase demodulation to described first phase identification signal and the described second phase identification signal, obtain identifying first phase differential of the phase difference value of the first phase identification signal and the second phase identification signal, and described first phase differential is sent to described central processing unit (A4).
6. method according to claim 1, it is characterized in that step 5 is specially: described central processing unit (A4) draws according to described first phase differential and described second phase differential because signal transmits the phase delay that distance produced between described first communication facilities (1) and the described second communication equipment (2), and calculates distance between described first communication facilities (1) and the described second communication equipment (2) according to the velocity of propagation of described phase delay and described first phase identification signal or the described second phase identification signal.
7. method according to claim 1 is characterized in that:
Also comprise before the step 11: the signal transmitting and receiving processing module (A1) of the central processing unit (A4) of first communication facilities (1) in first communication facilities (1) sends and is pre-stored in being used in the central processing unit (A4) and inquires about the status poll command information of second communication equipment (2) status information;
Step 12 also comprises: be sent to the signal transmitting and receiving processing module (B1) in the second communication equipment (2) after described signal transmitting and receiving processing module (A1) is modulated described status poll command information;
Step 21 also comprises: described signal transmitting and receiving processing module (B1) demodulates described status poll command information and is sent to the central processing unit (B4) of second communication equipment (2);
Step 23 also comprises: the status information that described central processing unit (B4) will be stored in the described second communication equipment (2) in the central processing unit (B4) is sent to described signal transmitting and receiving processing module (B1);
Step 32 also comprises: the signal transmitting and receiving processing module (A1) that is sent to described first communication facilities (1) after the status information modulation of described signal transmitting and receiving processing module (B1) with described second communication equipment (2);
Step 41 also comprises: described signal transmitting and receiving processing module (A1) demodulates the status information of described second communication equipment (2) and is sent to central processing unit (A4) in described first communication facilities (1).
8. method according to claim 6 is characterized in that:
Also comprise between step 31 and the step 32: the signal transmitting and receiving processing module (B1) of described central processing unit (B4) in second communication equipment (2) sends and to be pre-stored in being used in the central processing unit (B4) and to inquire about the status poll command information of first communication facilities (1) status information;
Step 32 also comprises: be sent to the signal transmitting and receiving processing module (A1) in the logical communication facilities after described signal transmitting and receiving processing module (B1) is modulated described status poll command information;
Step 41 also comprises: described signal transmitting and receiving processing module (A1) demodulates described status poll command information and is sent to the central processing unit (A4) of first communication facilities (1);
Also comprise after the step 5: the status information that described central processing unit (A4) will be stored in described first communication facilities (1) in central processing unit (A4) is sent to described signal transmitting and receiving processing module (A1); Be sent to described signal transmitting and receiving processing module (B1) after the status information modulation of described signal transmitting and receiving processing module (A1) with described first communication facilities (1); Described signal transmitting and receiving processing module (B1) demodulates the status information of described first communication facilities (1) and is sent to central processing unit (B4) in the described second communication equipment (2).
9. method according to claim 1, it is characterized in that also comprising step 6 after the described step 5: the signal that described first communication facilities (1) will include range information between described first communication facilities (1) and the described second communication equipment (2) sends to described second communication equipment (2).
10. method according to claim 6 is characterized in that also comprising after the described step 5:
Step 61: the signal that described central processing unit (A4) will include range information between described first communication facilities (1) and the described second communication equipment (2) is sent to described signal transmitting and receiving processing module (A1);
Step 62: be sent to described signal transmitting and receiving processing module (B1) after the signal modulation of described signal transmitting and receiving processing module (A1) with range information between described first communication facilities (1) and the described second communication equipment (2);
Step 63: described signal transmitting and receiving processing module (B1) demodulates the signal of range information between described first communication facilities (1) and the described second communication equipment (2) and is sent to described central processing unit (B4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100539125A CN101236251A (en) | 2007-01-30 | 2007-01-30 | Phase demodulation distance-finding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100539125A CN101236251A (en) | 2007-01-30 | 2007-01-30 | Phase demodulation distance-finding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101236251A true CN101236251A (en) | 2008-08-06 |
Family
ID=39919999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100539125A Pending CN101236251A (en) | 2007-01-30 | 2007-01-30 | Phase demodulation distance-finding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101236251A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185883A (en) * | 2011-12-31 | 2013-07-03 | 国民技术股份有限公司 | Primary distance measurement device, distance-measured device, distance measurement system and distance measurement method |
| CN109655818A (en) * | 2018-12-24 | 2019-04-19 | 苏州市建筑科学研究院集团股份有限公司 | A kind of radio frequency range unit and distance measuring method |
| WO2023272521A1 (en) * | 2021-06-29 | 2023-01-05 | Oppo广东移动通信有限公司 | Distance determination method and apparatus, devices and storage medium |
-
2007
- 2007-01-30 CN CNA2007100539125A patent/CN101236251A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185883A (en) * | 2011-12-31 | 2013-07-03 | 国民技术股份有限公司 | Primary distance measurement device, distance-measured device, distance measurement system and distance measurement method |
| CN109655818A (en) * | 2018-12-24 | 2019-04-19 | 苏州市建筑科学研究院集团股份有限公司 | A kind of radio frequency range unit and distance measuring method |
| CN109655818B (en) * | 2018-12-24 | 2024-02-06 | 苏州市建筑科学研究院集团股份有限公司 | Ranging method by using radio frequency ranging device |
| WO2023272521A1 (en) * | 2021-06-29 | 2023-01-05 | Oppo广东移动通信有限公司 | Distance determination method and apparatus, devices and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6940214B2 (en) | Positioning system | |
| CN109282811B (en) | Indoor and outdoor positioning system and method for interconnecting UWB (ultra wide band) and smart phone | |
| CN207427487U (en) | Alignment system | |
| CN107231614B (en) | Method for positioning label in wireless network and main base station | |
| US20080090588A1 (en) | Positioning system | |
| CN102662159B (en) | Method and system of reflection-type indoor positioning | |
| CN102645645A (en) | Indoor self-positioning method and system | |
| US11102746B2 (en) | Positioning system | |
| CN104280716A (en) | Indoor positioning device and method | |
| CN103344955A (en) | Wireless ranging node and wireless ranging method | |
| CN101210965A (en) | Wireless distance finding method, wireless distance finding and position finding method, apparatus and system | |
| CN102612170A (en) | Internet of Things logistics communication system based on master-slave node mode | |
| CN105527605A (en) | Multimode hybrid indoor positioning method | |
| CN102215564A (en) | Method and system for positioning wireless sensor network | |
| JPWO2009145325A1 (en) | Mobile body relative position detection system and mobile body performing relative position detection | |
| CN111722623A (en) | Automatic following system based on bluetooth array antenna location | |
| CN103929716A (en) | Positioning method and positioning information sending method and device | |
| US20110143778A1 (en) | System and method for estimating position of lost mobile terminal, and mobile terminal | |
| CN104039011A (en) | Positioning method and device | |
| CN101236251A (en) | Phase demodulation distance-finding method | |
| CN110736993A (en) | ultrasonic positioning system and method for indoor multi-target positioning | |
| CN103163501B (en) | Implementation method of infrared multi-machine coordinate positioning and communication | |
| KR101042343B1 (en) | The position recognition system of a vehicle in a harbor using a uwb sensor | |
| CN113038365B (en) | Label wireless positioning method and system | |
| CN109922426A (en) | Planar base station positioning method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080806 |